elco MHS Boilers Trispace AR 60 Installation and operation manual

Trispace AR Floor Standing Shell and Tube
Boiler
Operating & Maintenance Manual
MHS Boilers Ltd.
3 Juniper West
Fenton Way
Basildon Essex
SS15 6SJ
Telephone [phone] Fax [phone]
WWW.MHSBOILERS.COM L360

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Contents
1 GENERAL WARNINGS.............................................................................................................................. 3
2 GENERAL SAFETY RULES....................................................................................................................... 3
3 THE SUPPLIER.......................................................................................................................................... 6
4 THIS DOCUMENT...................................................................................................................................... 6
5 SERVICE .................................................................................................................................................... 6
6 GENERAL RESTRICTIONS....................................................................................................................... 6
7 DESCRIPTION OF THE APPLIANCE........................................................................................................ 6
8 TECHNICAL DATA..................................................................................................................................... 9
9 IDENTIFICATION ELEMENTS................................................................................................................... 9
10 LIST OF SPARE PARTS ............................................................................................................................ 9
11 STARTING UP THE BOILER ................................................................................................................... 10
12 TURNING OFF.......................................................................................................................................... 10
13 CLEANING................................................................................................................................................ 11
14 MAINTENANCE........................................................................................................................................ 11
15 PRODUCT RECEIPT................................................................................................................................ 11
16 INSTALLATION ........................................................................................................................................ 13
17 INSTALLATION PREMISES..................................................................................................................... 13
18 DISCHARGE OF COMBUSTION PRODUCTS........................................................................................ 13
19 HYDRAULIC CONNECTION.................................................................................................................... 13
20 ELECTRICAL SYSTEM............................................................................................................................ 14
21 THE PROBLEM OF CONDENSATE........................................................................................................ 14
22 FUEL SUPPLY.......................................................................................................................................... 15
23 BURNER CONNECTION.......................................................................................................................... 16
24 PANELLING ASSEMBLY ......................................................................................................................... 17
25 CONTROL PANEL ASSEMBLY............................................................................................................... 18
26 PRELIMINARY OPERATIONS PRIOR TO STARTING UP..................................................................... 18
27 FIRST START UP..................................................................................................................................... 19
28 CHECKS DURING AND AFTER INITIAL SWITCH.................................................................................. 19
29 MAINTENANCE........................................................................................................................................ 20
30 OPENING AND ADJUSTMENT OF THE DOOR ..................................................................................... 20
31 CLEANING OF THE BOILER................................................................................................................... 21
32 CHECKS AFTER THE BOILER CLEANING ............................................................................................ 21
33 TROUBLESHOOTING.............................................................................................................................. 21
34 Notes......................................................................................................................................................... 26

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1 GENERAL WARNINGS
This instruction booklet is an integral and essential part of the product.
Should the appliance be sold or transferred to another owner, or if you move and leave the appliance manual
behind, always ensure that this booklet accompanies the appliance so that the new owner and/or installation
technician can consult it.
This appliance must be used for the purpose for which it was specifically intended.
All contractual or non-contractual responsibility of the manufacturer is excluded in the event of
damages to persons or property caused by errors in installation, adjustment, maintenance and improper
use.
The manufacturer's responsibility is excluded for all damage to persons or property resulting from a clear risk
for the user which he could have avoided by taking suitable safety measures.
After having removed the packaging, check the contents for breakages. If you are in doubt do not use the
appliance, contact your supplier. Do not leave the packaging materials (wooden cage, nails, staples,
plastic bags, polystyrene foam, etc.) within the reach of children, as they are potential sources of risk.
The installation must be performed in compliance with the regulations in force, following the manufacturer's
instructions, by professionally qualified personnel. The term “professionally qualified personnel” means
persons with specific technical skills in the sector of heating systems and components for domestic use and
domestic hot water production.
To guarantee the efficiency of the appliance and ensure correct operation, it is indispensable to have regular
maintenance performed by professionally qualified personnel, following the manufacturer's instructions.
Any repairs to the appliance must be carried out using only original spare parts.
If you decide not to use the appliance for a long period, ensure you have professionally qualified
personnel to carry out the necessary operations here below:
-set the appliance main switch and the general switch on “off”;
-close fuel and water taps;
-empty the hydraulic water system in case of freezing.
2 GENERAL SAFETY RULES
The use of any component utilising energy power, fuels and water requires that certain fundamental
rules be respected, such as:
Do not allow unskilled people to use the appliance;
If you notice smell of gas, do not turn on electric switches, household appliances, telephone or any other
objects that could cause sparks. If this is the case:
- open doors and windows immediately to clear the air in the room;
- turn off the fuel supplies;
- contact professional qualified personnel.
Do not perform any maintenance and cleaning operations without having disconnected the electric power and
turned off the fuel supplies.
Do not pull, disconnect, and unwind electric cables coming from the boiler, even if they are disconnected from
the mains supply.

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Do not block or reduce the ventilation openings in the room to prevent the formation or toxic and
explosive mixtures caused by gas leakage; it is also uneconomic and polluting because it causes bad
combustion.
Do not expose the appliance to atmospheric agents.
The boiler has not been designed to work outdoors and is not provided with automatic frost protection.
Keep the boiler turned on in freezing conditions.
Other important warnings to be respected:
-If the power cable of the appliance is damaged, have it replaced by professionally qualified
personnel;
-do not fix (and do not allow other persons to fix) electric cables on the system pipes or near
sources of heat;
-ensure that the earthing cables of the appliance are not connected to the water system;
-do not touch the hot parts of the system in particular the manhole and the flue collector as they normally
remain hot even for some time after the appliance has been turned off.
-In the event of a water leak, turn off the system and contact exclusively professionally
qualified personnel.
The Trispace AR boiler is CE approved and applies to the following
European standards:
− 92 / 42 / EEC Boiler efficiency directive − 90 / 396 / EEC Gas appliance directive –
73 / 23/ EEC Low voltage directive − 89 / 336 / EEC EMC directive
− EN 656 Gas-fired central heating boilers –Type B boilers of nominal heat input exceeding
70 kW but not exceeding 300 kW
− EN 15420 Gas-fired central heating boilers - Type C boilers of nominal heat input
exceeding 70 kW, but not exceeding 1000 kW
− EN 15417 Gas-fired central heating boilers - Specific requirements for condensing boilers
with a nominal heat input greater than 70 kW but not exceeding 1000 kW
− EN 13836 Gas fired central heating boilers - Type B boilers of nominal heat input
exceeding 300 kW, but not exceeding 1000 kW
− EN 15502-1 Gas-fired central heating boilers - Part 1: General requirements and tests
− EN 55014-1 Electromagnetic compatibility - Requirements for household appliances,
electric tools and similar apparatus Part 1: Emission
− EN 55014-2 Electromagnetic compatibility - Requirements for household appliances,
electric tools and similar apparatus Part 2: Immunity - Product family standard
− EN 61000-3-2 Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic
current emissions (equipment input current 16 A per phase)

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− EN 61000-3-3 Electromagnetic compatibility (EMC) - Part 3-3: Limitation of voltage
changes, voltage fluctuations and flicker in public low-voltage supply systems, for
equipment with rated current 16 A per phase and not subject to conditional connection
− EN 60335-1 Household and similar electrical appliances -Safety - Part 1: General
requirements
− EN 50165 Household and similar electrical appliances -Safety - Part 2-102: Particular
requirements for gas, oil and solid-fuel burning appliances having electrical connections
The following Codes of Practice are also applicable: -
BS 6644: 2011 Specification for gas fired hot water boilers of rated inputs between 70kW (net) and 1.8MW
(net) (2nd and 3rd family gases).
BS 6880:1988 Code of Practice for low temperature hot water heating systems of output greater than 45kW.
Parts 1, 2 & 3.
BS 6891:2005 + A2:2008 Specification for installation of low-pressure gas pipework of up to 35mm (R11/4) in
domestic premises (2nd family gases).
BS 7593:2006 Code of Practice for treatment of water in domestic hot water central heating systems.
BS 7671:2008 Requirements for electrical installations. IEE Wiring Regulations. Seventeenth Edition
BS EN 12828 2003 Heating systems in buildings –Design for water based heating systems.
CISBE Guide reference sections B7, B11 and B13.
CP342 Part 2: 1974 Code of Practice for centralized hot water supply.
IGE/UP/1 or 1A Gas Tightness Testing & Purging of Commercial Industrial Gas Installations
IGE/UP/2 Gas installation pipework, boosters and compressors on Industrial and Commercial premises.
IGE/UP/4 Commissioning of gas fired plant on industrial and commercial premises.
IG/UP/10 edition 3 Installation of gas appliances in Industrial and Commercial premises.
Part 1: Flued appliances.
Through their unique construction, the Trispace range of central heating units are renowned for their:
- High thermal output
- Environmental-friendliness (they meet the most stringent environmental conditions)
- Low weight and compact size
- Durability
- Low noise level
- Broad control range
- Can be supplied in a wide range of models
Through active and market oriented research, MHS Boilers Ltd is in a position to offer solutions for the most
challenging heating requirements.

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3 THE SUPPLIER
MHS Boilers Ltd are proud to supply and technically support the Trispace Range of boilers throughout the
United Kingdom. For advice or more information please contact your local sales representative, our head
office via 01268 546700 or via our website www.mhsboilers.com
4 THIS DOCUMENT
The present documentation has been prepared with the following target groups in mind:
- The technical consultant
- The installer
- The maintenance technician
- The user
MHS Boilers Ltd has opted to make the technical documentation as comprehensive as possible in the form of
this book, in order to ensure that these target groups have all the information they need. As the supplier we
would be happy to help you in connection with any additional information that you may require. This document
covers the following aspects relating to the boilers:
- General description
- Technical specifications
- Requirements for design and installation
- Maintenance instructions
The operating instructions for the user have been affixed to the appliance itself.
5 SERVICE
For commissioning and assistance in maintenance matters, please contact the Technical Services
Department via 01268 546700.
6 GENERAL RESTRICTIONS
MHS Boilers Ltd products should always be used, installed and maintained in accordance with the statutory
requirements, specifications and standards applicable to these installations. All the data, information and
suggestions concerning its products provided by MHS Boilers Ltd are based on careful study. However, the
use, installation and operation of the same are outside the control of MHS Boilers Ltd and neither MHS Boilers
Ltd nor any other organisations associated with it, accept any liability for the same.
7 DESCRIPTION OF THE APPLIANCE
The steel boiler from the TRISPACE AR range is a high performance boiler for water heating systems
up to 90°C as well as -- when combined with a hot water tank -- for the production of domestic hot water.

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This is a pressurised combustion three-gas pass boiler:
the flame produced by the burner develops in the furnace (1st passage); the opening at the end of the
furnace leads to a duct through which products of combustion are conveyed until they reach the front
area (2nd passage).
Combustion gas inversion is clearly separated from the furnace in order to
reduce NOx. Products of combustion remain in the high temperature area causes low NOx formation.
In the front area, through the groove in the manhole insulation, products of combustion are
conveyed to the tube collection (3rd passage)
Here the products of combustion are forced by special turbolators to follow a whirling path which
increases the heat transfer due to convection. Maximum heat absorption is therefore obtained without
noxious gas or thermal stresses and above all with over 93% increase in the working efficiency.
On leaving the dry pipes, the products of combustion are collected in the rear chamber and conveyed to
the flue.
Burners fired with traditional liquid and gaseous fuels can be installed. The burner is installed on a hinged
door; this facilitates regulation and maintenance of the boiler and the burner without having to take out the
latter
The thermal insulation of the boiler body is obtained by applying a pad of highly insulating mineral
wool to keep thermal dispersions at very low levels. Elegant pre-painted steel panels complete the outside
finish.
As a result, there are many advantages with TRISPACE AR series: there is less fuel consumption, greater
heat exchange efficiency.
The pre-connected electric control panel that automatically controls the boiler is positioned on the top of the
boiler.
The electric diagram can be found inside the control board and in Appendix 1.

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1 - Boiler body 8 - Flue condensate discharge
2 - Door 9 - Technical specs and identification plate
3 - Burner plate 10 - Instrument board
4 - Pilot flame r - Return heating
5 - Flue collector m - Heating delivery
6 - Flue pipe s - Drain
7 - Cleaning door v - Safety valve connection or expansion vessel

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8 TECHNICAL DATA
Trispace AR
Model
60
90
135
160
180
240
280
315
360
400
460
650
800
Nominal
output
kW
60
90
135
161.4
180
241.7
281
315
367
400
465.6
650
800
Thermal
output
kW
64.1
95.8
143.2
170
190.4
255
296
331.5
383
420
489
682
840
Boiler
Backpressure
mbar
0.4
0.8
1.1
1.7
1.8
2.3
2.5
2.8
2.6
3.4
5.5
7.4
8.1
Water side
pressure loss
(at 15°C)
mbar
14
8
7
10
12
23
30
35
22
27
35
40
45
Water content
dm3
90
143
225
279
279
388
463
463
641
641
716
1100
1215
Weight empty
kg
245
355
425
495
500
670
750
760
1105
1120
1225
1890
2120
Maximum
working
pressure
bar
5
6
Minimum return
working
temperature
°C
50
Maximum
allowable
temperature
°C
100
9 IDENTIFICATION ELEMENTS
The appliance can be identified through the Data Plate that contains the performing values and identification
data.
The plate is applied in the front upper part, right.
For any servicing and spare part the correct identification of the boiler model will facilitate all operations
IMPORTANT: ensure that the boiler is provided with a data plate. If not, ask the installation technician to have
it installed
10 LIST OF SPARE PARTS
The spare parts recommended for two years of operation are the following:
1 control thermostat
1 safety thermostat
1 door gasket
1 flue collector gasket
1 burner plate gasket
1 flame sight glass
1 flame sight glass gasket

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The following spare parts may also be supplied in the event of accidental damage or malfunction:
-Thermometer
-Complete control panel
-Complete door
-Complete smokebox
-Complete or partial casing
-Complete turbolator set
11 STARTING UP THE BOILER
The boiler must be started up for the first time by professionally qualified personnel; subsequently it
will operate automatically.
At times it may be necessary for the user to re-start the boiler manually, for example after a period of
prolonged absence.
In this case the following must be checked:
- that the heating system fuel and water controls are open;
- that the pressure of the hydraulic system when cold ranges from 1 to 1.5 bar;
- that the calibration of the boiler regulation thermostat; is included between 60° and 90°C;
- that the ambient thermostat is active and set to 20°C;
-that the system pumps are not blocked.
Turn on the master switch and then the main switch on the control panel
The boiler will perform an ignition phase and once started will remain on until the set temperatures have been
reached.
Operation will be automatic from now on.
If ignition or operation problems occur, switch the boiler off and call professionally qualified personnel.
12 TURNING OFF
In the event of temporary periods of inactivity (week-ends, short trips, etc.) with no danger of frost, follow the
procedure below:
-turn off the main switch on the control panel (OFF);
-turn off the boiler isolation switch.
CAUTION: if there is danger of frost, do not carry out the above operations but set the ambient thermostat on
approx. 10°C.
In the event of a long period of inactivity, follow the procedure below:
-turn off the main switch on the control panel (OFF)
-turn of the plant main switch.
-close fuel and thermal plant water controls.
CAUTION: if there is danger of frost, have the thermal plant emptied by professional qualified
personnel.

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13 CLEANING
Before cleaning operations make sure that:
-the main switch on the control panel has been turned off (OFF);
-the boiler isolation switch has been turned off.
The user should only clean the outside casing of the boiler using a wet cloth with soap.
If the dirt is particularly difficult to remove, soak with water and methylated spirit. Do not use abrasive
sponges or products and do not clean with jets of water.
14 MAINTENANCE
Periodic maintenance and measurement of the combustion efficiency are required and the person in charge of
the heating system must ensure that these checks are carried out by professionally qualified personnel.
15 PRODUCT RECEIPT
The TRISPACE AR boilers are delivered as described below:
1 x boiler body (inside the combustion chamber are the instrument panel box containing the documents, the
mineral wool for insulation of the boiler and the ceramic fibre mat for plugging the burner draught tube
void.
1 x cardboard box containing the casing panels.
The boiler must be handled by means of the lifting eyebolts using suitable equipment.
In view of the weight of the boiler, you are advised not to attempt to move it manually.

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Dimensions
TRISPACE AR
MODEL
60
90
135
160
180
240
280
315
360
400
460
650
800
Dimensions
mm
B
560
620
680
680
680
780
780
780
880
880
880
1010
1060
mm
L
1090
1260
1460
1710
1710
1760
2010
2010
2160
2160
2360
2490
2740
mm
H
910
1030
1160
1160
1160
1360
1360
1360
1530
1530
1530
1720
1770
mm
B1
500
560
620
620
620
720
720
720
820
820
820
950
1000
mm
L1
758
860
1010
1260
1260
1260
1510
1510
1612
1612
1812
2016
2266
mm
L2
405
470
520
520
520
560
560
560
660
660
660
640
640
mm
L3
388
330
440
690
690
690
940
940
900
900
1100
1165
1415
mm
H1
619
705
800
800
800
950
950
950
1060
1060
1060
1275
1300
mm
H2
310
345
380
380
380
430
430
430
480
480
480
548
548
mm
H3
130
130
130
130
130
130
130
130
135
135
135
160
140
Fittings
ND
r/m
1”1/4
2”
65
65
65
65
65
65
80
80
80
100
100
ND
v
1”
1”1/4
1”1/2
1”1/2
1”1/2
1”1/2
1”1/2
1”1/2
2”
2”
2”
65
65
ND
s
¾”
¾”
¾”
¾”
¾”
¾”
¾”
¾”
1”
1”
1”
1”
1”
mm
∅f
150
180
200
200
200
250
250
250
300
300
300
350
350

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16 INSTALLATION
17 INSTALLATION PREMISES
The boiler must be installed in a room that complies with the provisions and minimum distances established
by the current regulations and is provided with suitably sized air vents.
The boiler must be positioned on a flat surface capable of uniformly supporting the base structure section
bars.
The surface should be raised from the floor.
CAUTION: if the burner is powered with combustible gas with specific gravity higher (i.e. LPG) than the
specific gravity of air, the electrical parts must be positioned above 0.5 metres from ground level.
The boiler must not be installed outside as it has not been designed for outdoor installation and is not
provided with automatic frost protection.
18 DISCHARGE OF COMBUSTION PRODUCTS
Correct burner/boiler/flue coupling drastically reduces consumption, optimises combustion with low emission
of contaminants and provides effective protection against condensation.
The FLUE must be resistant to heat and condensation, thermally insulated, hermetically sealed, without
bottlenecks or obstructions, as vertical as possible and sized according to current regulations.
The CONNECTION BETWEEN THE BOILER AND THE FLUE must comply with the current regulations
and legislation and consist of rigid hermetically sealed pipes resistant to high temperatures,
condensation and mechanical stress.
For sealing the joints, use materials that can withstand at least 250°C
Badly sized and shaped flues and couplings between boiler and flue can amplify the combustion noise,
negatively affect the combustion parameters and cause condensation problems.
CAUTION: non-insulated flue outlet pipes are a potential source of danger.
19 HYDRAULIC CONNECTION
The choice and installation of the system components is the responsibility of the installer who must operate
in accordance with correct working practice and the current legislation.
The following recommendations should be observed:
-The boiler fittings must not be strained by the weight of the system connection pipes as this can be
dangerous and the latter must therefore be sustained and appropriately positioned.
- Cut-off devices must not under any circumstances be fitted between the boiler and the expansion vessel
and between the boiler and the safety valves.
- The expansion vessel must be correctly sized (there must be no leaks of water due to normal expansion)
and, if the expansion vessel is closed, the safety valves must open only in exceptional cases in order to
minimise any subsequent introduction of water and in any case to ensure that it is introduced and
controlled by one single point in the system
- Ensure that the safety valve outlets are connected to a drain. If not, when the valves operate they will flood
the room and the manufacturer will accept no liability for this.

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- Ensure that the hydraulic pipes are not used as earth connections for the electrical or telephone system.
They are not suitable for this use and can rapidly deteriorate leading to serious damage.
- Before connecting up the boiler, flush, cleanse and dose all the system pipes to remove any debris that
could affect correct operation.
- If the water available for filling the system is hard (> 15 French degrees) or corrosive (pH < 7.2), a treatment
plant should be provided otherwise permanent damage can occur.
-If the mains water supply contains impurities, a suitable filter must be fitted.
- Avoid any accidental contact between the heating system water and the portable water as the former is not
drinkable.
After connection to the hydraulic system, ensure that the latter is completely de-aerated.
You are advised to insulate the heating system pipes to avoid heat dispersion resulting in increased fuel
consumption and environmental pollution.
20 ELECTRICAL SYSTEM
The electrical system must comply with the current regulations and be installed by professionally
qualified personnel.
Electrical safety of the equipment is ensured only when it is correctly connected to an efficient earth
system in compliance with the current safety regulations. The manufacturer will not be liable for any
damage caused by failure to earth the system.
Call professionally qualified personnel to check that the electrical system is suitable for the maximum power
absorbed by the equipment, ensuring in particular that the system cable sections are suitable for the
power absorbed by the equipment.
Adapters, multiple sockets and extension leads must not be used for general power supply of the
equipment from the mains.
For connection to the mains, a twin-pole switch must be provided in compliance with the current
regulations.
21 THE PROBLEM OF CONDENSATE
The water vapour contained in the products of combustion discharged from the boiler condenses when
the temperature of the water returning to the boiler is below 50°C. Condensation occurs in particular
when the boiler comes on in the morning after being switched off during the night.
The condensation is acid and corrosive and will gradually attack the boiler sheet metal panels.
To limit the formation of condensate as far as possible an anti-condensate pump must be fitted following the
diagram illustrated.
When the burner starts, a thermostat positioned on the water return to the boiler and set to 55°C with
exchange contact will start up the anti-condensate pump which will continue to operate until the set
temperature is reached; the thermostat will then simultaneously switch off the anti-condensate pump and
switch on the system pumps.

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In order to totally eliminate the problem, the above circuit must be correctly adjusted in order to
maintain the boiler constantly at 55°C even at night and a further temperature-limiting thermostat must be
added to prevent the system mixing valve from sending water below 55°C to the boiler.
This will ensure long life of the boiler.
The flow rate of the anti-condensate pump is normally 25%-30% of the system pump flow rate, whereas
the head required is not particularly high as it only has to overcome the resistance of the boiler and the
valves.
The flue collector of the TRISPACE AR boilers is provided with a fitting for discharge of any condensation
that forms during the start-up phase.
Do not connect the fitting directly to the mains drainage system but to a collecting basin in order to monitor
condensation.
For accurate monitoring, check that the condensate forming in the flue does not also end up in the
basin.
The condensation is acidic and corrosive and will therefore contaminate if discharged into the mains
drainage system.
Before emptying the basin into the mains drainage system, the acid level must therefore be restored to
between pH 6.5 and 9 using neutralising products.
22 FUEL SUPPLY
The fuel supply line must comply with current regulations and be laid by professionally qualified personnel.
Before installation, you are advised to thoroughly clean the inside of all the fuel supply pipes in order to
remove any debris that may affect correct operation of the boiler.
Check the fuel supply system internal and external seal.
If using gas, the connections must be perfectly sealed.
Check that the fuel supply system is provided with the safety and control devices prescribed by the current
regulations.
Do not use the fuel system pipes to earth electrical or telephone systems.
Check that the boiler is pre-set for operation with the type of fuel available.
HEATING PUMP
SHUNT PUMP
THERMOSTAT
ISOLATION VALVES
NON RETURN VALVE

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23 BURNER CONNECTION
For installation of the burner, the electrical connections and the necessary settings, consult the burner
instruction manual.
Ascertain that the correct type of burner has been chosen for the boiler, checking the technical specifications
of both.
The burner draught tube must be sized as shown below:
Secure the burner to the door by means of the fixing plate so that the flame is parallel and centred in
the furnace; if not, combustion problems can occur with the risk of seriously damaging the boiler.
IMPORTANT: after installing the burner, fill any space between the draught tube and the hole of the door
with the material provided, resistant to 1000°C (ceramic fibre mat).
This operation prevents overheating of the door which would otherwise be permanently deformed.
For models TRISPACE AR from 135 to 800: If the burner is provided with an air intake, connect it by means of
a rubber tube to the intake located on the flame inspection window: in this way the glass will remain clear.
If the burner is not provided with air intake, remove the intake on the flame inspection window and close the
hole with a ∅1/8” BSP plug.
The fuel connections to the burner must be positioned in order to permit complete opening of the boiler door
with the burner fitted
CERAMIC FIBRE

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24 PANELLING ASSEMBLY
IMPORTANT: the casing must be fitted once all the installation work has been completed.
Take the mineral wool (1) out of the furnace and wrap it around the boiler pipes, starting at the top and fixing it
to the inlet and outlet pipes, making a hole in the wool with your hands.
Secure it to the piping using the clips provided.
Begin assembly with the left side panel(s) (3) ensuring that you position first the bottom and then the top of
the panel on the corner elements of the boiler structure.
Fit the right side panel(s) (2) taking the same precautions as with the left side.
To fit the rear casing, proceed as follows: position the bottom front panel (7) and lock it on the side panels by
means of the self-tapping screws; fix the top front panel (8) in the same way.
Position the top panels (4) (5) on the boiler.
Before joining them, prepare the control panel (6) as specified below and fix it to the top right panel as follows:
uncoil the probe capillaries, pass them through the hole in the panel and insert them in the wells near the
delivery pipe.
Fix the control panel to the panel.
Join the top panels locking them to the side panels by means of the slot-in connections.

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25 CONTROL PANEL ASSEMBLY
The instrument panel is inside a box in the boiler combustion chamber. Power supply voltage: 220V - 50Hz.
Open the instrument panel by unscrewing the self-tapping screws.
Uncoil the instrument probe capillaries making sure that you do not damage them and pass them
through the hole on the bottom of the panel.
Take the boiler casing cover and insert the probe capillaries in the hole and fix the control panel to the casing.
Lean the cover on the boiler and insert the probes in the bulbs and ensure that they don’t come out
accidentally.
CAUTION: all the control board capillary probes must be inserted in the boiler body bulbs near the heating
system delivery fitting.
The electrical connections must be carried out following the electric wiring diagram. (Appendix 1 page 28)
Do not fix the electrical cables on the boiler body sheet metal panels, on the door or on the flue collector.
Close the control board.
26 PRELIMINARY OPERATIONS PRIOR TO STARTING UP
Before starting up:
- ensure that the regulation and control instrument probes are positioned correctly in their
wells;
- ensure that the turbolators do not protrude from the front of the fume pipes;
- check that the system is filled with water, de-aerated and at a pressure ranging from 1 and 1.5 bar;
- check that all the control and safety devices are in good working order and correctly set;
- check that the furnace is free from foreign bodies;
- check that the refractory lining of the door has not been damaged;
- check that the burner draught tube has been correctly plugged
- check that the door has been correctly tightened
-check that the system on-off valves are completely open and that the pumps rotate correctly;
- ensure that there is enough fuel available and that the isolation valves are open.

Trispace AR Floor Standing Shell and TubeBoiler
19 L360 ©MHS Boilers 06/09/2013
27 FIRST START UP
After performing the preliminary checks, perform the following operations to start the boiler:
- set the boiler thermostat(s) on the control panel between 60 and 90°C according to the
type of installation;
- set the controls to an on position;
- set the master switch to “on”;
- press the main control panel switch (the button light will come on).
The boiler will perform an ignition phase and, once started, will remain on until the set temperatures have
been reached.
Operation will be automatic from now on.
28 CHECKS DURING AND AFTER INITIAL START-UP
Once the boiler has been started, check that it stops and then starts again by:
- altering the boiler thermostat setting;
- turning the control panel main switch off;
- altering the setting of the control thermostat.
Check the seal on all the gaskets on the water and combustion side; they must be further tightened while hot
in order to guarantee a perfect seal.
This operation is of fundamental importance for the gaskets of the door, of the burner plate and of the smoke
box to prevent leakage of toxic and therefore hazardous combustion fumes into the boiler room.
The weight of the overhanging burner tends to loosen the gasket of the burner plate and the door at the top
It is also very important to check the boiler/flue coupling seal for the above reasons.
Check correct rotation of the pumps.
Check total stoppage by means of the master switch.
Once all the conditions are satisfied, the burner must be correctly set to the maximum power
permitted by the boiler, analysing the combustion products to obtain correct combustion and lowest
possible emission of contaminants.
Ideal flue gas temperature during normal operation is approximately 90 to110°C.
Given that the pressure of the water contained in the system increases during operation, ensure that
its maximum value does not exceed the boiler boiling pressure.

Trispace AR Floor Standing Shell and TubeBoiler
20 L360 ©MHS Boilers 06/09/2013
29 MAINTENANCE
Periodical maintenance is essential for the safety, efficiency and long life of the equipment.
It is also required by law and must be carried out by professionally qualified personnel.
Before carrying out any work, you are advised to perform a combustion analysis to ascertain the operating
conditions and obtain any other useful information.
After performing the combustion analysis and before any other operation:
- disconnect the electricity supply by switching off the master switch;
- close the fuel on-off taps.
30 OPENING AND ADJUSTMENT OF THE DOOR
The door can be opened from both sides.
The opening is normally from left to right.
To open the door, remove the fixing nuts from the left.
Lifting equipment must be used to change the door opening direction.
Proceed as follows:
- hook the door to the lifting device from the two holes provided at the top;
- remove the four tightening nuts;
- slide the door out;
- unscrew the two locknuts remaining on the tie rods and screw them onto the tie rods on
the other side;
-refit the door ensuring correct location of the locknut seats into the door bushes;
- tighten the four fixing nuts.
To adjust the tightening:
- tighten the adjustment locknuts ensuring that they do not protrude from the door bush seat;
-tighten the fixing nuts adopting a cross sequence. Tighten only as far as required to ensure a uniform
airtight closure.
-screw the adjustment locknuts in until locked.
Usually, at each maintenance operation, the door adjustment should be inspected.